Thesis (MSc)--Stellenbosch University, 2002. / ENGLISH ABSTRACT: We use Hanbury-Brown Twiss interferometry to determine Bose-Einstein correlations in the
transverse and longitudinal directions. By using these two directions, we are able to determine
the shape of the pion emitting source. The analysis is done with the UA1 (1985) data for pp
collisions at Vs = 630 GeV. Two frames of reference, namely the laboratory frame and the
Longitudinal Center-of-Mass System (LCMS) are used. A fit to a two-dimensional Gaussian
parametrization yields good results.
In the laboratory frame, an oblate form of the source is observed, with the value of the
transverse radius (rt) larger than the longitudinal (rL) one. The LCMS analysis finds a prolate
form of the source (rt < rL). A few reasons are discussed for the difference in the shape between
the different reference frames. Our results are also compared with other hadron-hadron and
e+ e: experiments. / AFRIKAANSE OPSOMMING: Hanbury-Brown Twiss interferometrie was gebruik om Bose-Einstein korrelasies in die transversale
en longitudinale rigtings te bepaal. Deur hierdie twee rigtings te gebruik, kan die vorm van
die pion-bron bepaal word. Die UA1 (1985) datastel van die pp botsings by Vs = 630 GeV is
gebruik om die analise uit te voer. Twee verwysingstelsels, naamlik die laboratorium stelsel en
die Longitudinale Massamiddelpunt-stelsel is aangewend. 'n Passing met 'n twee-dimensionele
Gaussiese parametrisering het goeie resultate opgelewer.
In die laboratorium stelsel, is 'n ovaalvormige vorm vir die bron waargeneem, met die transversale
radius (rt) groter as die longitudinale radius (rl)' Die Longitudinale Massamiddelpunt stelsel
het 'n prolate vorm vir die bron voorspel, met rt < ri, 'n Paar redes vir die verskil in die vorm
van die pion-bron vir die verskillende verwysingstelsels word bespreek. Ons resultate word ook
met ander hadron-hadron en e+e- eksperimente vergelyk.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/53200 |
| Date | 03 1900 |
| Creators | October, Faith Joy |
| Contributors | Eggers, H. C., Stellenbosch University. Faculty of Science. Dept. of Physics. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | 67 pages : illustrations |
| Rights | Stellenbosch University |
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